Interest rate protection: fixed rate, rate cap or variable rate?

Updated 15 October 2026

The monthly payment on a variable-rate housing loan rises when rates rise. Interest rate protection limits that risk, at a price. This guide compares the options with ECB statistics on average rates of new housing loans in Finland and the Asumisvalinta calculator. The parts of the rate and today's averages are explained in how a housing loan rate is formed.

The options

A variable rate is a reference rate plus the bank's margin. The rate is reset at agreed intervals and the monthly payment changes with it.
A fixed rate stays the same for an agreed period. The payment neither rises nor falls during that period.
A rate cap (korkokatto) is a paid add-on that sets a maximum for the reference rate for an agreed period. Below the cap, the rate follows the reference rate.
A rate collar (korkoputki) sets both a maximum and a minimum for the reference rate. The reference rate rises no higher than the cap and falls no lower than the floor.

	Protection from rising rates	If rates fall	Price	Repaying early
Variable rate	None	Payment falls	No separate price	No compensation for a fall in rates
Fixed rate	For the whole fixed period	Payment does not fall	Usually a higher rate than variable	The bank may charge compensation if rates have fallen
Rate cap	Up to the cap for the agreed period	Payment falls	Separate fee	As set out in the contract
Rate collar	Up to the cap for the agreed period	Payment falls down to the floor	Separate fee	As set out in the contract

Under the Consumer Protection Act, a bank may charge compensation when a housing loan is repaid early if more than €20,000 was lent and the rate is fixed or the reference rate period is at least three years. The compensation is at most the loss caused by the fall in interest rates over the remaining fixed period, and the bank must give a calculation of it. If rates have risen since fixing, there is no such loss.

A fixed rate has usually cost more

In August 2026 the average variable rate on new housing loans was 3.22% and the average rate fixed for 1 to 5 years 3.68%.

Variable and fixed rates on new housing loansFinland, monthly average

VariableFixed 1 to 5 years

Variable

3.22 %

Fixed 1 to 5 years

3.68 %

Difference, pp

+0.46

August 2026

Average rates on new housing loans in Finland: variable rates and rates fixed for up to a year, and rates fixed for over 1 and up to 5 years. Source: ECB statistics.

Since January 2000, the fixed rate was above the variable rate in 276 of 320 months. The median difference was 0.58 percentage points.
The fixed rate was below the variable rate mainly from April 2023 to December 2024, right after variable rates had risen.

The higher rate is the price you pay for a payment that stays the same.

Did fixing pay off?

The calculator compares a €200,000 loan over 25 years in two ways for every start month from January 2000 to September 2021:

Fixed: the average rate fixed for 1 to 5 years in the start month, for five years.
Variable: the average variable rate, reset every 12 months.

Each bar shows how much less (up) or more (down) interest the fixed loan cost over five years.

Did fixing the rate pay off?Five years of interest on a €200,000 loan over 25 years, fixed against variable, by start month

Fixing savedFixing cost

Fixing paid off

41 / 261

start months

Largest saving

€12,600

April 2021

Largest extra cost

€26,600

July 2008

Fixed: the average rate fixed for 1 to 5 years in the start month, kept for five years. Variable: the average variable rate, reset every 12 months. Averages of new loans, not any bank's offer. Source: ECB statistics; calculation Asumisvalinta.

Fixing paid off in 41 of 261 start months. They fell in 2004 to 2005 and from June 2019 to September 2021, just before rates rose in 2022.
The largest saving came from fixing at 1.07% in April 2021: €12,600 over five years.
The largest extra cost came from fixing at 5.61% in July 2008: €26,600. The average variable rate fell from 5.55% in October 2008 to 1.92% by December 2009.

A fixed rate works as insurance. Most of the time it cost more than it paid back, and it paid off when rates rose fast soon after fixing.

The monthly payment as rates change

The calculator starts from today's averages: variable 3.22% and fixed 3.68% for five years. The example cap is 4.22% for five years, one percentage point above today's variable rate. Choose a rate path to see how the payment and the rate change.

Monthly payment if rates rise, stay or fall€200,000 loan over 25 years, annuity

VariableFixed 3.68 % for 5 yearsCap at 4.22 % for 5 years

The variable rate moves as it did from January 2022, starting from today's level.

Interest in 5 years

Variable

€49,210

Fixed

€34,450

Cap

€37,590

The variable rate resets every 12 months. Today's rates are the average variable rate and the average rate fixed for 1 to 5 years on new housing loans, August 2026. The cap level is an example; its fee is not included. Source: ECB statistics; calculation Asumisvalinta.

The payment starts at €971 a month with the variable rate and €1,021 with the fixed rate.
If rates move as they did from 2022, the variable payment rises to €1,343 at most. The fixed payment stays at €1,021 for five years, and the cap keeps it at €1,076 at most. Over five years the interest comes to €49,210 with the variable rate, €34,450 with the fixed rate and €37,590 with the cap, plus the price of the cap.
If rates stay where they are, the fixed loan costs €4,430 more interest over five years than the variable one. The cap then costs only its own price.

When protection makes sense

Nobody knows where rates will go. Whether you need protection therefore depends more on your own finances than on rate forecasts:

Buffer. If a payment a few hundred euros higher each month would be hard to carry, protection may be worth its price.
Loan size relative to income. The larger the loan, the more the same rise in rates lifts the payment.
Time horizon. If you plan to sell or repay the loan within a few years, check the compensation terms of a fixed rate and the terms of a cap before agreeing.

The payment at different rates is shown in the chart of how a housing loan rate is formed.

How to compare offers

Get the price and terms in writing. For a cap or collar: the levels, how long they apply, the price and how it is paid. In decisions of the Finnish Financial Ombudsman Bureau (FINE), the price of a cap was set when the loan was drawn, and the levels of a collar were checked on the drawdown date.
Ask what happens if you repay early. A fixed rate can lead to compensation, and part of the price of a cap can be refunded if the contract says so.
Compare the total cost. Add up the interest and the price of the protection over the protection period and compare them with a variable rate under different rate paths.
Make sure the protection is in the loan agreement. In disputes handled by FINE, a promised protection had been left out of the agreement.

Once you know what rate and payment you can carry, compare buying, renting and right of occupancy with your own figures.

Compare a flat

Sources

Interest rates on new loans for house purchase by fixation period, Finland, ECB Data Portal. Source: ECB statistics.
Consumer Protection Act 38/1978, chapter 7 a, sections 19 and 20: repaying a loan early and the bank's right to compensation.
Finnish Financial Ombudsman Bureau FINE, decisions FINE-047078, FINE-053124 and FINE-003845: terms of rate caps and collars in practice.
Methodology, Asumisvalinta: how the calculator computes loan payments and interest.